DLP Based Anti-Piracy Display System

Camcorder piracy has great impact on the movie industry. Although there are many methods to prevent recording in theatre, no recognized technology satisfies the need of defeating camcorder piracy as well as having no effect on the audience. This paper presents a new projector display technique to defeat camcorder piracy in the theatre using a new paradigm of information display technology, called temporal psychovisual modulation (TPVM). TPVM exploits the difference in image formation mechanisms of human eyes and imaging sensors. The images formed in human vision is continuous integration of the light field while discrete sampling is used in digital video acquisition which has ,blackout- period in each sampling cycle. Based on this difference, we can decompose a movie into a set of display frames and broadcast them out at high speed so that the audience can not notice any disturbance, while the video frames captured by camcorder will contain highly objectionable artifacts. The proposed prototype system built on the platform of DLP® LightCrafter 4500TMserves as a proof-of-concept of anti-piracy system.